WX factors. Altitude deviation altitude excursion air carrier encounters thunderstorms with severe turbulence and is unable to maintain assigned altitude.

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Attributes
ACN	300700
Time
Date	199502
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : txo
State Reference	NM
Altitude	msl bound lower : 32000 msl bound upper : 33000
Aircraft 1
Controlling Facilities	artcc : zab
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	300700
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation

Narrative:

While in the area of texico VOR we received a message from dispatch saying that there were thunderstorms in the area. About that time we entered the top of a cell. We encountered severe turbulence. We had been assigned FL330, but we were unable and did descend to FL320. We tried desperately to call center for a climb or a descent, but they were too busy. They appeared to have 1 man working several frequencys at once, and we were blocked out while transmitting.

Original NASA ASRS Text

Title: WX FACTORS. ALTDEV ALT EXCURSION ACR ENCOUNTERS TSTMS WITH SEVERE TURB AND IS UNABLE TO MAINTAIN ASSIGNED ALT.

Narrative: WHILE IN THE AREA OF TEXICO VOR WE RECEIVED A MESSAGE FROM DISPATCH SAYING THAT THERE WERE TSTMS IN THE AREA. ABOUT THAT TIME WE ENTERED THE TOP OF A CELL. WE ENCOUNTERED SEVERE TURB. WE HAD BEEN ASSIGNED FL330, BUT WE WERE UNABLE AND DID DSND TO FL320. WE TRIED DESPERATELY TO CALL CTR FOR A CLB OR A DSCNT, BUT THEY WERE TOO BUSY. THEY APPEARED TO HAVE 1 MAN WORKING SEVERAL FREQS AT ONCE, AND WE WERE BLOCKED OUT WHILE XMITTING.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.